--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/code/compiledIC.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,662 @@
+/*
+ * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_compiledIC.cpp.incl"
+
+
+// Every time a compiled IC is changed or its type is being accessed,
+// either the CompiledIC_lock must be set or we must be at a safe point.
+
+//-----------------------------------------------------------------------------
+// Low-level access to an inline cache. Private, since they might not be
+// MT-safe to use.
+
+void CompiledIC::set_cached_oop(oop cache) {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ assert (!is_optimized(), "an optimized virtual call does not have a cached oop");
+ assert (cache == NULL || cache != badOop, "invalid oop");
+
+ if (TraceCompiledIC) {
+ tty->print(" ");
+ print_compiled_ic();
+ tty->print_cr(" changing oop to " INTPTR_FORMAT, (address)cache);
+ }
+
+ if (cache == NULL) cache = (oop)Universe::non_oop_word();
+
+ *_oop_addr = cache;
+ // fix up the relocations
+ RelocIterator iter = _oops;
+ while (iter.next()) {
+ if (iter.type() == relocInfo::oop_type) {
+ oop_Relocation* r = iter.oop_reloc();
+ if (r->oop_addr() == _oop_addr)
+ r->fix_oop_relocation();
+ }
+ }
+ return;
+}
+
+
+oop CompiledIC::cached_oop() const {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ assert (!is_optimized(), "an optimized virtual call does not have a cached oop");
+
+ if (!is_in_transition_state()) {
+ oop data = *_oop_addr;
+ // If we let the oop value here be initialized to zero...
+ assert(data != NULL || Universe::non_oop_word() == NULL,
+ "no raw nulls in CompiledIC oops, because of patching races");
+ return (data == (oop)Universe::non_oop_word()) ? (oop)NULL : data;
+ } else {
+ return InlineCacheBuffer::cached_oop_for((CompiledIC *)this);
+ }
+}
+
+
+void CompiledIC::set_ic_destination(address entry_point) {
+ assert(entry_point != NULL, "must set legal entry point");
+ assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ if (TraceCompiledIC) {
+ tty->print(" ");
+ print_compiled_ic();
+ tty->print_cr(" changing destination to " INTPTR_FORMAT, entry_point);
+ }
+ MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+#ifdef ASSERT
+ CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call);
+ assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
+#endif
+ _ic_call->set_destination_mt_safe(entry_point);
+}
+
+
+address CompiledIC::ic_destination() const {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ if (!is_in_transition_state()) {
+ return _ic_call->destination();
+ } else {
+ return InlineCacheBuffer::ic_destination_for((CompiledIC *)this);
+ }
+}
+
+
+bool CompiledIC::is_in_transition_state() const {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ return InlineCacheBuffer::contains(_ic_call->destination());
+}
+
+
+// Returns native address of 'call' instruction in inline-cache. Used by
+// the InlineCacheBuffer when it needs to find the stub.
+address CompiledIC::stub_address() const {
+ assert(is_in_transition_state(), "should only be called when we are in a transition state");
+ return _ic_call->destination();
+}
+
+
+//-----------------------------------------------------------------------------
+// High-level access to an inline cache. Guaranteed to be MT-safe.
+
+
+void CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) {
+ methodHandle method = call_info->selected_method();
+ bool is_invoke_interface = (bytecode == Bytecodes::_invokeinterface && !call_info->has_vtable_index());
+ assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ assert(method->is_oop(), "cannot be NULL and must be oop");
+ assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic");
+ assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?");
+
+ address entry;
+ if (is_invoke_interface) {
+ int index = klassItable::compute_itable_index(call_info->resolved_method()());
+ entry = VtableStubs::create_stub(false, index, method());
+ assert(entry != NULL, "entry not computed");
+ klassOop k = call_info->resolved_method()->method_holder();
+ assert(Klass::cast(k)->is_interface(), "sanity check");
+ InlineCacheBuffer::create_transition_stub(this, k, entry);
+ } else {
+ // Can be different than method->vtable_index(), due to package-private etc.
+ int vtable_index = call_info->vtable_index();
+ entry = VtableStubs::create_stub(true, vtable_index, method());
+ InlineCacheBuffer::create_transition_stub(this, method(), entry);
+ }
+
+ if (TraceICs) {
+ ResourceMark rm;
+ tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT,
+ instruction_address(), method->print_value_string(), entry);
+ }
+
+ Events::log("compiledIC " INTPTR_FORMAT " --> megamorphic " INTPTR_FORMAT, this, (address)method());
+ // We can't check this anymore. With lazy deopt we could have already
+ // cleaned this IC entry before we even return. This is possible if
+ // we ran out of space in the inline cache buffer trying to do the
+ // set_next and we safepointed to free up space. This is a benign
+ // race because the IC entry was complete when we safepointed so
+ // cleaning it immediately is harmless.
+ // assert(is_megamorphic(), "sanity check");
+}
+
+
+// true if destination is megamorphic stub
+bool CompiledIC::is_megamorphic() const {
+ assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ assert(!is_optimized(), "an optimized call cannot be megamorphic");
+
+ // Cannot rely on cached_oop. It is either an interface or a method.
+ return VtableStubs::is_entry_point(ic_destination());
+}
+
+bool CompiledIC::is_call_to_compiled() const {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+
+ // Use unsafe, since an inline cache might point to a zombie method. However, the zombie
+ // method is guaranteed to still exist, since we only remove methods after all inline caches
+ // has been cleaned up
+ CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
+ bool is_monomorphic = (cb != NULL && cb->is_nmethod());
+ // Check that the cached_oop is a klass for non-optimized monomorphic calls
+ // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used
+ // for calling directly to vep without using the inline cache (i.e., cached_oop == NULL)
+#ifdef ASSERT
+#ifdef TIERED
+ CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address());
+ bool is_c1_method = caller->is_compiled_by_c1();
+#else
+#ifdef COMPILER1
+ bool is_c1_method = true;
+#else
+ bool is_c1_method = false;
+#endif // COMPILER1
+#endif // TIERED
+ assert( is_c1_method ||
+ !is_monomorphic ||
+ is_optimized() ||
+ (cached_oop() != NULL && cached_oop()->is_klass()), "sanity check");
+#endif // ASSERT
+ return is_monomorphic;
+}
+
+
+bool CompiledIC::is_call_to_interpreted() const {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ // Call to interpreter if destination is either calling to a stub (if it
+ // is optimized), or calling to an I2C blob
+ bool is_call_to_interpreted = false;
+ if (!is_optimized()) {
+ // must use unsafe because the destination can be a zombie (and we're cleaning)
+ // and the print_compiled_ic code wants to know if site (in the non-zombie)
+ // is to the interpreter.
+ CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
+ is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob());
+ assert(!is_call_to_interpreted || (cached_oop() != NULL && cached_oop()->is_compiledICHolder()), "sanity check");
+ } else {
+ // Check if we are calling into our own codeblob (i.e., to a stub)
+ CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address());
+ address dest = ic_destination();
+#ifdef ASSERT
+ {
+ CodeBlob* db = CodeCache::find_blob_unsafe(dest);
+ assert(!db->is_adapter_blob(), "must use stub!");
+ }
+#endif /* ASSERT */
+ is_call_to_interpreted = cb->contains(dest);
+ }
+ return is_call_to_interpreted;
+}
+
+
+void CompiledIC::set_to_clean() {
+ assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call");
+ if (TraceInlineCacheClearing || TraceICs) {
+ tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", instruction_address());
+ print();
+ }
+
+ address entry;
+ if (is_optimized()) {
+ entry = SharedRuntime::get_resolve_opt_virtual_call_stub();
+ } else {
+ entry = SharedRuntime::get_resolve_virtual_call_stub();
+ }
+
+ // A zombie transition will always be safe, since the oop has already been set to NULL, so
+ // we only need to patch the destination
+ bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint();
+
+ if (safe_transition) {
+ if (!is_optimized()) set_cached_oop(NULL);
+ // Kill any leftover stub we might have too
+ if (is_in_transition_state()) {
+ ICStub* old_stub = ICStub_from_destination_address(stub_address());
+ old_stub->clear();
+ }
+ set_ic_destination(entry);
+ } else {
+ // Unsafe transition - create stub.
+ InlineCacheBuffer::create_transition_stub(this, NULL, entry);
+ }
+ // We can't check this anymore. With lazy deopt we could have already
+ // cleaned this IC entry before we even return. This is possible if
+ // we ran out of space in the inline cache buffer trying to do the
+ // set_next and we safepointed to free up space. This is a benign
+ // race because the IC entry was complete when we safepointed so
+ // cleaning it immediately is harmless.
+ // assert(is_clean(), "sanity check");
+}
+
+
+bool CompiledIC::is_clean() const {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ bool is_clean = false;
+ address dest = ic_destination();
+ is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() ||
+ dest == SharedRuntime::get_resolve_virtual_call_stub();
+ assert(!is_clean || is_optimized() || cached_oop() == NULL, "sanity check");
+ return is_clean;
+}
+
+
+void CompiledIC::set_to_monomorphic(const CompiledICInfo& info) {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
+ // Updating a cache to the wrong entry can cause bugs that are very hard
+ // to track down - if cache entry gets invalid - we just clean it. In
+ // this way it is always the same code path that is responsible for
+ // updating and resolving an inline cache
+ //
+ // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized
+ // callsites. In addition ic_miss code will update a site to monomorphic if it determines
+ // that an monomorphic call to the interpreter can now be monomorphic to compiled code.
+ //
+ // In both of these cases the only thing being modifed is the jump/call target and these
+ // transitions are mt_safe
+
+ Thread *thread = Thread::current();
+ if (info._to_interpreter) {
+ // Call to interpreter
+ if (info.is_optimized() && is_optimized()) {
+ assert(is_clean(), "unsafe IC path");
+ MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+ // the call analysis (callee structure) specifies that the call is optimized
+ // (either because of CHA or the static target is final)
+ // At code generation time, this call has been emitted as static call
+ // Call via stub
+ assert(info.cached_oop().not_null() && info.cached_oop()->is_method(), "sanity check");
+ CompiledStaticCall* csc = compiledStaticCall_at(instruction_address());
+ methodHandle method (thread, (methodOop)info.cached_oop()());
+ csc->set_to_interpreted(method, info.entry());
+ if (TraceICs) {
+ ResourceMark rm(thread);
+ tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s",
+ instruction_address(),
+ method->print_value_string());
+ }
+ } else {
+ // Call via method-klass-holder
+ assert(info.cached_oop().not_null(), "must be set");
+ InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry());
+
+ if (TraceICs) {
+ ResourceMark rm(thread);
+ tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via mkh", instruction_address());
+ }
+ }
+ } else {
+ // Call to compiled code
+ bool static_bound = info.is_optimized() || (info.cached_oop().is_null());
+#ifdef ASSERT
+ CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry());
+ assert (cb->is_nmethod(), "must be compiled!");
+#endif /* ASSERT */
+
+ // This is MT safe if we come from a clean-cache and go through a
+ // non-verified entry point
+ bool safe = SafepointSynchronize::is_at_safepoint() ||
+ (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean()));
+
+ if (!safe) {
+ InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry());
+ } else {
+ set_ic_destination(info.entry());
+ if (!is_optimized()) set_cached_oop(info.cached_oop()());
+ }
+
+ if (TraceICs) {
+ ResourceMark rm(thread);
+ assert(info.cached_oop() == NULL || info.cached_oop()()->is_klass(), "must be");
+ tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s",
+ instruction_address(),
+ ((klassOop)info.cached_oop()())->print_value_string(),
+ (safe) ? "" : "via stub");
+ }
+ }
+ // We can't check this anymore. With lazy deopt we could have already
+ // cleaned this IC entry before we even return. This is possible if
+ // we ran out of space in the inline cache buffer trying to do the
+ // set_next and we safepointed to free up space. This is a benign
+ // race because the IC entry was complete when we safepointed so
+ // cleaning it immediately is harmless.
+ // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
+}
+
+
+// is_optimized: Compiler has generated an optimized call (i.e., no inline
+// cache) static_bound: The call can be static bound (i.e, no need to use
+// inline cache)
+void CompiledIC::compute_monomorphic_entry(methodHandle method,
+ KlassHandle receiver_klass,
+ bool is_optimized,
+ bool static_bound,
+ CompiledICInfo& info,
+ TRAPS) {
+ info._is_optimized = is_optimized;
+
+ nmethod* method_code = method->code();
+ address entry = NULL;
+ if (method_code != NULL) {
+ // Call to compiled code
+ if (static_bound || is_optimized) {
+ entry = method_code->verified_entry_point();
+ } else {
+ entry = method_code->entry_point();
+ }
+ }
+ if (entry != NULL) {
+ // Call to compiled code
+ info._entry = entry;
+ if (static_bound || is_optimized) {
+ info._cached_oop = Handle(THREAD, (oop)NULL);
+ } else {
+ info._cached_oop = receiver_klass;
+ }
+ info._to_interpreter = false;
+ } else {
+ // Note: the following problem exists with Compiler1:
+ // - at compile time we may or may not know if the destination is final
+ // - if we know that the destination is final, we will emit an optimized
+ // virtual call (no inline cache), and need a methodOop to make a call
+ // to the interpreter
+ // - if we do not know if the destination is final, we emit a standard
+ // virtual call, and use CompiledICHolder to call interpreted code
+ // (no static call stub has been generated)
+ // However in that case we will now notice it is static_bound
+ // and convert the call into what looks to be an optimized
+ // virtual call. This causes problems in verifying the IC because
+ // it look vanilla but is optimized. Code in is_call_to_interpreted
+ // is aware of this and weakens its asserts.
+
+ info._to_interpreter = true;
+ // static_bound should imply is_optimized -- otherwise we have a
+ // performance bug (statically-bindable method is called via
+ // dynamically-dispatched call note: the reverse implication isn't
+ // necessarily true -- the call may have been optimized based on compiler
+ // analysis (static_bound is only based on "final" etc.)
+#ifdef COMPILER2
+#ifdef TIERED
+#if defined(ASSERT)
+ // can't check the assert because we don't have the CompiledIC with which to
+ // find the address if the call instruction.
+ //
+ // CodeBlob* cb = find_blob_unsafe(instruction_address());
+ // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized");
+#endif // ASSERT
+#else
+ assert(!static_bound || is_optimized, "static_bound should imply is_optimized");
+#endif // TIERED
+#endif // COMPILER2
+ if (is_optimized) {
+ // Use stub entry
+ info._entry = method()->get_c2i_entry();
+ info._cached_oop = method;
+ } else {
+ // Use mkh entry
+ oop holder = oopFactory::new_compiledICHolder(method, receiver_klass, CHECK);
+ info._cached_oop = Handle(THREAD, holder);
+ info._entry = method()->get_c2i_unverified_entry();
+ }
+ }
+}
+
+
+inline static RelocIterator parse_ic(CodeBlob* code, address ic_call, oop* &_oop_addr, bool *is_optimized) {
+ address first_oop = NULL;
+ // Mergers please note: Sun SC5.x CC insists on an lvalue for a reference parameter.
+ CodeBlob *code1 = code;
+ return virtual_call_Relocation::parse_ic(code1, ic_call, first_oop, _oop_addr, is_optimized);
+}
+
+CompiledIC::CompiledIC(NativeCall* ic_call)
+ : _ic_call(ic_call),
+ _oops(parse_ic(NULL, ic_call->instruction_address(), _oop_addr, &_is_optimized))
+{
+}
+
+
+CompiledIC::CompiledIC(Relocation* ic_reloc)
+ : _ic_call(nativeCall_at(ic_reloc->addr())),
+ _oops(parse_ic(ic_reloc->code(), ic_reloc->addr(), _oop_addr, &_is_optimized))
+{
+ assert(ic_reloc->type() == relocInfo::virtual_call_type ||
+ ic_reloc->type() == relocInfo::opt_virtual_call_type, "wrong reloc. info");
+}
+
+
+// ----------------------------------------------------------------------------
+
+void CompiledStaticCall::set_to_clean() {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
+ // Reset call site
+ MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+#ifdef ASSERT
+ CodeBlob* cb = CodeCache::find_blob_unsafe(this);
+ assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
+#endif
+ set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub());
+
+ // Do not reset stub here: It is too expensive to call find_stub.
+ // Instead, rely on caller (nmethod::clear_inline_caches) to clear
+ // both the call and its stub.
+}
+
+
+bool CompiledStaticCall::is_clean() const {
+ return destination() == SharedRuntime::get_resolve_static_call_stub();
+}
+
+bool CompiledStaticCall::is_call_to_compiled() const {
+ return CodeCache::contains(destination());
+}
+
+
+bool CompiledStaticCall::is_call_to_interpreted() const {
+ // It is a call to interpreted, if it calls to a stub. Hence, the destination
+ // must be in the stub part of the nmethod that contains the call
+ nmethod* nm = CodeCache::find_nmethod(instruction_address());
+ return nm->stub_contains(destination());
+}
+
+
+void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
+ address stub=find_stub();
+ assert(stub!=NULL, "stub not found");
+
+ if (TraceICs) {
+ ResourceMark rm;
+ tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
+ instruction_address(),
+ callee->name_and_sig_as_C_string());
+ }
+
+ NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object
+ NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
+
+ assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(), "a) MT-unsafe modification of inline cache");
+ assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry, "b) MT-unsafe modification of inline cache");
+
+ // Update stub
+ method_holder->set_data((intptr_t)callee());
+ jump->set_jump_destination(entry);
+
+ // Update jump to call
+ set_destination_mt_safe(stub);
+}
+
+
+void CompiledStaticCall::set(const StaticCallInfo& info) {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
+ MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
+ // Updating a cache to the wrong entry can cause bugs that are very hard
+ // to track down - if cache entry gets invalid - we just clean it. In
+ // this way it is always the same code path that is responsible for
+ // updating and resolving an inline cache
+ assert(is_clean(), "do not update a call entry - use clean");
+
+ if (info._to_interpreter) {
+ // Call to interpreted code
+ set_to_interpreted(info.callee(), info.entry());
+ } else {
+ if (TraceICs) {
+ ResourceMark rm;
+ tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT,
+ instruction_address(),
+ info.entry());
+ }
+ // Call to compiled code
+ assert (CodeCache::contains(info.entry()), "wrong entry point");
+ set_destination_mt_safe(info.entry());
+ }
+}
+
+
+// Compute settings for a CompiledStaticCall. Since we might have to set
+// the stub when calling to the interpreter, we need to return arguments.
+void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) {
+ nmethod* m_code = m->code();
+ info._callee = m;
+ if (m_code != NULL) {
+ info._to_interpreter = false;
+ info._entry = m_code->verified_entry_point();
+ } else {
+ // Callee is interpreted code. In any case entering the interpreter
+ // puts a converter-frame on the stack to save arguments.
+ info._to_interpreter = true;
+ info._entry = m()->get_c2i_entry();
+ }
+}
+
+
+void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
+ assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
+ // Reset stub
+ address stub = static_stub->addr();
+ assert(stub!=NULL, "stub not found");
+ NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object
+ NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
+ method_holder->set_data(0);
+ jump->set_jump_destination((address)-1);
+}
+
+
+address CompiledStaticCall::find_stub() {
+ // Find reloc. information containing this call-site
+ RelocIterator iter((nmethod*)NULL, instruction_address());
+ while (iter.next()) {
+ if (iter.addr() == instruction_address()) {
+ switch(iter.type()) {
+ case relocInfo::static_call_type:
+ return iter.static_call_reloc()->static_stub();
+ // We check here for opt_virtual_call_type, since we reuse the code
+ // from the CompiledIC implementation
+ case relocInfo::opt_virtual_call_type:
+ return iter.opt_virtual_call_reloc()->static_stub();
+ case relocInfo::poll_type:
+ case relocInfo::poll_return_type: // A safepoint can't overlap a call.
+ default:
+ ShouldNotReachHere();
+ }
+ }
+ }
+ return NULL;
+}
+
+
+//-----------------------------------------------------------------------------
+// Non-product mode code
+#ifndef PRODUCT
+
+void CompiledIC::verify() {
+ // make sure code pattern is actually a call imm32 instruction
+ _ic_call->verify();
+ if (os::is_MP()) {
+ _ic_call->verify_alignment();
+ }
+ assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted()
+ || is_optimized() || is_megamorphic(), "sanity check");
+}
+
+
+void CompiledIC::print() {
+ print_compiled_ic();
+ tty->cr();
+}
+
+
+void CompiledIC::print_compiled_ic() {
+ tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT,
+ instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination());
+}
+
+
+void CompiledStaticCall::print() {
+ tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address());
+ if (is_clean()) {
+ tty->print("clean");
+ } else if (is_call_to_compiled()) {
+ tty->print("compiled");
+ } else if (is_call_to_interpreted()) {
+ tty->print("interpreted");
+ }
+ tty->cr();
+}
+
+void CompiledStaticCall::verify() {
+ // Verify call
+ NativeCall::verify();
+ if (os::is_MP()) {
+ verify_alignment();
+ }
+
+ // Verify stub
+ address stub = find_stub();
+ assert(stub != NULL, "no stub found for static call");
+ NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object
+ NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
+
+ // Verify state
+ assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
+}
+
+#endif